How to add a Webview in Flutter?

You can use https://pub.dartlang.org/packages/webview_flutter

example

import 'package:webview_flutter/webview_flutter.dart';

return Scaffold(
      appBar: AppBar(
        title: const Text('Flutter WebView example'),
      ),
      body: const WebView(
        initialUrl: 'https://flutter.io',
        javascriptMode: JavascriptMode.unrestricted,
      ),
    );